Qmark LFK Series - Wall Heaters - Manual (Page 3)

a. Run a power supply cable into the area above the top of
the wall opening. All wiring must be in accordance with
National and Local electrical codes. Refer to Table 1,
page 1 for correct wire size.
b. Install a cable clamp in the knockout in the top of back
box.
c. Insert power supply cable through cable clamp, allowing at
least 6" (152mm) of cable length to remain inside the back
box to facilitate connections.
d. Ground the back box by connecting the supply ground wire
to the green ground screw located in the inside top of the
back box.
3. Mounting Back Box
a. Place the back box into wall opening flush with finished
wall surface on bottom and sides of box. (Top flange of
back box should protrude approximately 1/2" (12.7mm)
from finished wall surface).
b. Secure the back box in place with wood screws or nails.
(optional) Installation of back box With
Surface-Mounting Frame (see Figure 3).
1. Secure back box to wall (with knockouts in upper right
hand corner) using screws and anchors.
2. Hang the surface-mounting frame on the back box.
Ensure that the back edge of the surface-mounting
frame is flush against the wall.
noTe: If heater is located in a high traffic area where it may be
subjected to vandalism or abuse, take extreme care to see that
the box is firmly attached to the wall.
3. Power Supply Wiring
noTe: Wiring Compartment Volume - 119"3 (1950cm3).
a. Run a power supply cable into the area of the upper right
corner of the mounting frame. All wiring must be in accor-
dance to National and local Electrical Codes. Refer to
Table 1 for proper wire sizes.
noTe: If the wiring is to run through the wall, cut a hole in the
wall near the top of the back box. Run the supply wire through
this hole. Then remove the knockout from the top of the box and
proceed to step c.
b. Remove the knockout on the top side of the frame.
c. Feed the power supply cable through the frame allowing 6"
(152mm) of lead to remain inside the frame
d. Secure the power supply cable to the back box (using
cable clamps, connector, or other suitable strain relief)
allowing 6”(152mm) of lead to remain inside the inner
housing.
e. Ground the back box by connecting the supply ground
leadwire to the green ground screw located in the inside
top of the back box.
Installation of Heater Assembly and Grille
After back box is completely installed and no further construction
dirt is expected, clean debris from back box, remove heater
assembly from its carton, then refer to Figure 4 and proceed as
follows:
1. Insert the heater assembly into back box, placing the four
mounting holes (with key-hole slots) over the screws in the
back box. Tighten all screws securely.
2. If surface-mounting frame is used, ensure that the frame is
even with all four heater assembly tabs before tightening
screws.
3. Connect the lead wires from the disconnect switch to the
lead wires from the fan deck. (see wiring diagrams)
After connection, push wires back into opening.
4. Turn thermostat to the extreme counterclockwise position.
5. Mount the grille using four (4) long screws provided. The
screws thread into holes located in the side flanges of the
back box.
6. Push thermostat knob onto thermostat shaft.
Figure 3: Surface Mounting Installation
HANG FRAME
ON BACK BOX
15-5/32"
(385mm)
19"
(482mm)
3-13/16"
(97mm)
MOUNT BACK BOX TO
WALL USING REAR
MOUNTING HOLES.
Figure 4
RECESS BACK
BOX
HEATER
ASSEMBLY
THERMOSTAT
KNOB
GRILLE
1500, 4800, 4000, & 3000 WATT HEATERS
120V, 208V, 240V, OR 277V (Full wattage heaters can be
converted to half wattage by removing the red jumper wire
connecting the top and bottom element terminals.)
noTe: Conversion not applicable on K151FC.
3